

The sensor is triggered by a HIGH pulse of 10 or more microseconds. Go to File ExamplesUltrasonic sensor library Ultrasonic testerĬomplete Guide for Ultrasonic Sensor HC-SR04.ZIP library and select the library you’ve just downloaded


Ultrasonic ranging module HC - SR04 provides 2cm - 400cm non-contact measurement function, the ranging accuracy can reach to 3mm. Ultrasonic sensor can detect movement of targets and measure the distance to them in many automated factories and process plants.
